Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 87)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć5
Figure 7.2
Status Block Ć Showing Word Assignments
11215
The module sends diagnostic
information in this word when you
request it thru the command block or
when the module detects an error in
the parameter block immediately after
powerĆup.
Future Use
Address Pointer
Status Word 1 (Axis 1)
Status Word 2 (Axis 1)
(MS) Position/FE/Diagnostic (Axis 1)
(LS) Position/FE/Diagnostic (Axis 1)
Status Word 1 (Axis 2
Status Word 2 (Axis 2)
(MS) Position/FE/Diagnostic (Axis 2)
(LS) Position/FE/Diagnostic (Axis 2)
Status Word 1 (Axis 3)
Status Word 2 (Axis 3)
(MS) Position/FE/Diagnostic (Axis 3)
(LS) Position/FE/Diagnostic (Axis 3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Word
Status Block Format
We reserve the first word of the status block for future use. It contains all
zeros when returned by the 1771-M3 controller. The second word is an
address pointer that identifies the next block the processor is to transfer to
the 1771-M3 controller. Words 3 thru 6 provide the status of axis 1.
Words 7 thru 10 provide the status of axis 2. Words 11 thru 14 provide
the status of axis 3.
The following sections describe status block words.
The servo positioning assembly configures all words in the status block.
Address Pointer
The address pointer word (Figure 7.3) contains, in BCD format, the data
table address of the next block to be transferred from the processor to the
1771-M3 controller. Your ladder diagram program reads this address and
uses it to configure a write block transfer instruction. The 1771-M3
controller programs this word according to its requirements. When it does